/Engine/Source/Runtime/Sockets/Public/SocketSubsystem.h
Conversion functions from the SocketProtocolFamily enum to the newFNamesystem. For now, both are supported, but it's better to use theFNamewhen possible.
virtual ESocketProtocolFamily GetProtocolFamilyFromName ( const [FName](API\Runtime\Core\UObject\FName) & InProtocolName ) const